Laser-pumped cesium magnetometers for high-resolution medical and fundamental research
- Groeger, Stephan Physics Department, Université de Fribourg, Switzerland - Paul Scherrer Institute, Villigen, Switzerland
- Bison, Georg Physics Department, Université de Fribourg, Switzerland
- Knowles, Paul E. Physics Department, Université de Fribourg, Switzerland
- Wynands, Robert Physics Department, Université de Fribourg, Switzerland
- Weis, Antoine Physics Department, Université de Fribourg, Switzerland
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20.12.2005
Published in:
- Sensors and Actuators A: Physical. - 2006, vol. 129, no. 1-2, p. 1-5
English
Laser-pumped cesium magnetometers allow highly sensitive magnetometry at room temperature. We report on applications of that technique in biomagnetic diagnostics and in a neutron electric dipole moment (nEDM) experiment. In the biomagnetic application the magnetic field from the beating human heart is detected using a gradiometer, which reaches an intrinsic sensitivity of 80 fT/Hz1/2. The device can record time-resolved magnetic field maps above the human body surface with a spatial resolution of 4 cm and its performance is comparable to commercial devices based on the SQUID technique. In the nEDM experiment laser-pumped cesium magnetometers are used to measure and stabilize a dc magnetic field at a level of 10⁻⁷. Those devices reach an intrinsic sensitivity of about 14 fT/Hz1/2 with a measurement bandwidth of 1 kHz. The general principle of operation and specific results are presented.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 6408
- DOI 10.1016/j.sna.2005.09.036
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300146
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